2004 Johnson 175 HP (J175GLSRM)...Can you tell me what the timing is supposed to be set on?....I talked to a dealer in the upper part of the state and he says that you can advance the timing a couple or few degrees and it will make it run better but not to go over to much or you'll burn a hole in the piston...Is that true?...He also has a Dyno, but it doesnt fit newer motors...So, Im still stuck trying to find a place that has a dyno...